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Extend handling of immediates on ARM's SystemTap SDT probe support 

Continuing my series of fixes on the SystemTap SDT support for the
ARM/AArch64 architectures, this patch now extends how ARM's SDT specific
parser handles literal numbers (immediates).

Currently, it only accepts "#" as the prefix.  However, according to
"info '(as) ARM-Chars'", expressions can also have "$" and nothing as a
prefix.  This patch extends the parser to accept those options.

2013-12-28  Sergio Durigan Junior  <sergiodj@redhat.com>

	* arm-linux-tdep.c (arm_stap_is_single_operand): Accept "$" as a
	literal prefix.  Also accept no prefix at all.
	(arm_stap_parse_special_token): Likewise.
	(arm_linux_init_abi): Likewise.
This commit is contained in:
Sergio Durigan Junior 2013-12-28 19:20:58 -02:00
parent 08248ca9fe
commit 8d85bacb91
2 changed files with 11 additions and 4 deletions
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7
gdb/ChangeLog
View File

@ -1,3 +1,10 @@
2013-12-28 Sergio Durigan Junior <sergiodj@redhat.com>
* arm-linux-tdep.c (arm_stap_is_single_operand): Accept "$" as a
literal prefix. Also accept no prefix at all.
(arm_stap_parse_special_token): Likewise.
(arm_linux_init_abi): Likewise.
2013-12-28 Sergio Durigan Junior <sergiodj@redhat.com>
PR tdep/15653

8
gdb/arm-linux-tdep.c
View File

@ -1116,7 +1116,7 @@ arm_linux_displaced_step_copy_insn (struct gdbarch *gdbarch,
static int
arm_stap_is_single_operand (struct gdbarch *gdbarch, const char *s)
{
return (*s == '#' /* Literal number. */
return (*s == '#' || *s == '$' || isdigit (*s) /* Literal number. */
|| *s == '[' /* Register indirection or
displacement. */
|| isalpha (*s)); /* Register value. */
@ -1183,8 +1183,8 @@ arm_stap_parse_special_token (struct gdbarch *gdbarch,
++tmp;
tmp = skip_spaces_const (tmp);
if (*tmp++ != '#')
return 0;
if (*tmp == '#' || *tmp == '$')
++tmp;
if (*tmp == '-')
{
@ -1235,7 +1235,7 @@ static void
arm_linux_init_abi (struct gdbarch_info info,
struct gdbarch *gdbarch)
{
static const char *const stap_integer_prefixes[] = { "#", NULL };
static const char *const stap_integer_prefixes[] = { "#", "$", "", NULL };
static const char *const stap_register_prefixes[] = { "r", NULL };
static const char *const stap_register_indirection_prefixes[] = { "[",
NULL };